package com.xubeizhi.utils;

import org.springframework.aop.framework.AopContext;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * @author mi
 * @create 2023/3/8 10:57
 */
public class SpringUtils implements ApplicationContextAware {
    /**
     * Spring应用上下文环境
     */
    private static ApplicationContext applicationContext;
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringUtils.applicationContext = applicationContext;
    }

    /**
     * 获取applicationContext
     * @return  applicationContext
     */
    public static ApplicationContext getApplicationContext(){
        return applicationContext;
    }

    /**
     * 获取对象
     * @param name
     * @return  Object 一个以所给名字注册的bean的实例
     * @param <T>
     * @throws BeansException
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) throws BeansException{
        return (T) getApplicationContext().getBean(name);
    }

    /**
     * 获取类型为requiredType的对象
     * @param clz
     * @return
     * @param <T>
     * @throws BeansException
     */
    public static <T> T getBean(Class<T> clz) throws BeansException{
        T result = (T) getApplicationContext().getBean(clz);
        return result;
    }

    /**
     * 如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true
     * @param name
     * @return
     */
    public static boolean containsBean(String name){
        return getApplicationContext().containsBean(name);
    }

    /**
     * 判断以给定名字注册的bean定义是一个singleton还是一个prototype。如果与给定名字相应的bean定义没有被找到，将会抛出一个异常（NoSuchBeanDefinitionException）
     * @param name
     * @return
     * @throws NoSuchBeanDefinitionException
     */
    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException{
        return getApplicationContext().isSingleton(name);
    }

    /**
     *
     * @param name
     * @return Class 注册对象的类型
     * @throws NoSuchBeanDefinitionException
     */
    public static Class<?> getType(String name) throws NoSuchBeanDefinitionException{
        return getApplicationContext().getType(name);
    }

    /**
     * 如果给定的bean名字在bean定义中有别名，则返回这些别名
     * @param name
     * @return
     * @throws NoSuchBeanDefinitionException
     */
    public static String[] getAliases(String name) throws NoSuchBeanDefinitionException{
        return getApplicationContext().getAliases(name);
    }

    /**
     * 获取aop代理对象
     * @param invoker
     * @return
     * @param <T>
     */
    @SuppressWarnings("unchecked")
    public static <T> T getAopProxy(T invoker){
        return (T) AopContext.currentProxy();
    }

    /**
     * 获取当前的环境配置，无配置返回null
     * @return  当前环境配置
     */
    public static String[] getActiveProfiles(){
        return applicationContext.getEnvironment().getActiveProfiles();
    }

    /**
     * 获取当前的环境配置，当有多个环境配置时，只获取第一个
     * @return 当前的环境配置
     */
    public static String getActiveProfile(){
        final String[] activeProfiles = getActiveProfiles();
        return activeProfiles!=null && activeProfiles.length > 0 ? activeProfiles[0] : null;
    }
}
